Vulnerability Name:

CVE-2016-10027 (CCN-127976)

Assigned:2016-12-22
Published:2016-12-22
Updated:2021-02-23
Summary:Race condition in the XMPP library in Smack before 4.1.9, when the SecurityMode.required TLS setting has been set, allows man-in-the-middle attackers to bypass TLS protections and trigger use of cleartext for client authentication by stripping the "starttls" feature from a server response.
CVSS v3 Severity:5.9 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N)
5.2 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): None
Availibility (A): None
4.8 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:N)
4.2 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): Low
User Interaction (UI): Required
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): High
Availibility (A): None
CVSS v2 Severity:4.3 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:P/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): None
Availibility (A): None
4.9 Medium (CCN CVSS v2 Vector: AV:N/AC:H/Au:S/C:N/I:C/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): High
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): Complete
Availibility (A): None
Vulnerability Type:CWE-362
Vulnerability Consequences:Bypass Security
References:Source: MITRE
Type: CNA
CVE-2016-10027

Source: MLIST
Type: Mailing List, Patch, Third Party Advisory
[oss-security] 20161222 Re: CVE Request: Smack: TLS SecurityMode.required not always enforced, leading to striptls attack

Source: BID
Type: Third Party Advisory, VDB Entry
95129

Source: CCN
Type: BID-95129
Ignite Realtime Smack CVE-2016-10027 Man in the Middle Security Bypass Vulnerability

Source: CONFIRM
Type: Vendor Advisory
https://community.igniterealtime.org/blogs/ignite/2016/11/22/smack-security-advisory-2016-11-22

Source: XF
Type: UNKNOWN
smack-cve201610027-sec-bypass(127976)

Source: CONFIRM
Type: Patch, Third Party Advisory
https://github.com/igniterealtime/Smack/commit/059ee99ba0d5ff7758829acf5a9aeede09ec820b

Source: CCN
Type: igniterealtime/Smack GIT Repository
Move TLS Required check at the end of connect()

Source: CONFIRM
Type: Patch, Third Party Advisory
https://github.com/igniterealtime/Smack/commit/a9d5cd4a611f47123f9561bc5a81a4555fe7cb04

Source: CONFIRM
Type: Issue Tracking, Vendor Advisory
https://issues.igniterealtime.org/projects/SMACK/issues/SMACK-739

Source: FEDORA
Type: Third Party Advisory
FEDORA-2016-897a1e6698

Vulnerable Configuration:Configuration 1:
  • cpe:/a:igniterealtime:smack:*:*:*:*:*:*:*:* (Version < 4.1.9)

    • Configuration 2:
  • cpe:/o:fedoraproject:fedora:25:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    igniterealtime smack *
    fedoraproject fedora 25